There are several different sound programs available for the Creature Clock.

Mockingbird and owls (this is the most popular version)
Daytime
On the hour: a variety of mockingbird calls is generated.
There are 4 different variations of calls that are rotated through on subsequent hours.
On the quarter hour: a songbird chirp
Nighttime
On the hour: a Great Horned Owl hoots three times
On the quarter hour: three cricket chirpsHear a sample

Mockingbird and frogs
Daytime
On the hour: a variety of mockingbird calls.
There are 4 different variations of calls that are rotated through on subsequent hours.
On the quarter hour: a songbird chirp.
Nighttime
On the hour: pond frogs croak 6 times.
On the quarter hour: three cricket chirps.Hear a sample

Roosters
It is possible to add a rooster to the mockingbird programs. In this version, a rooster will crow on the hour for the first two hours in the morning. In other words, if your room gets light at 6 AM, a rooster will be heard at 6 AM and at 7 AM. Otherwise the sounds are as described above.Hear a sample

Mockingbird and Loons
Daytime
On the hour: a variety of mockingbird calls
On the quarter hour: warbling vireo
Nighttime
On the hour: Loons in the distance
On the quarter hour: three cricket chirpsHear a sample

Meadowlark and Owls
Daytime
On the hour: a meadowlark calls
On the quarter hour: warbling vireo
Nighttime
On the hour: a Great Horned Owl
On the quarter hour: three cricket chirpsHear a sample

Counting Crows
This program counts. In other words, at one oclock one call is heard, at 2 oclock two calls are heard, etc.
Daytime
On the hour: a sequence of bird calls is generated. At noon, all of the calls are heard.
The exact sequence is as follows:
crow, crow, jay, jay, jay, jay, woodpecker, crow, jay, jay, jay, jay
On the quarter hour: a songbird chirp
Nighttime
On the hour: a series of pond frogs are heard. At one AM one frog is heard. At 2 AM two frogs are heard.
At midnight all 12 frogs are heard.
On the quarter hour: three cricket chirps

Ducks and Frogs
This program counts. In other words, at one oclock one call is heard, at 2 oclock two calls are heard, etc.
Daytime
On the hour: a variety of duck calls
On the quarter hour: a songbird chirp.
Nighttime
On the hour: a frog chorus
On the quarter hour: three cricket chirps

Wooden flute
Daytime or nighttime
On the hour: the traditional Westminster chimes tune is played on a Puny Tune wooden flute.
Actually, the tune has been slightly modified to be in a minor key.
Following the tune, several flute tones are played to chime the hours (4 tones at 4 oclock, for example).
On the half hour: a single flute tone is heard (no sound is heard at the 15 and 45 minute intervals).Hear a sample

Wind chimes
Daytime or nighttime
On the hour: the sound of a small wind chime is heard, as if a breeze has just blown through the room.
The chime that was recorded has short (4-6) brass tubes, so the sound is high and twinkling.
Following the chime, the largest tube is played several times to count the hours (4 tones at 4 oclock, for example).
On the quarter hour: two small chimes are heard.Hear a sample